Water supply line fastener



FIG. 1 is a perspective view of the water supply line fastener;

FIG. 2 is a front elevational view, the rear elevational view being a substantial mirror image thereof;

FIG. 3 is a right side elevational view, the left side elevational view being a substantial mirror image thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design of a water supply line fastener, as shown and described. 